My daughter's golden only needed the collar for a few weeks and has learned where the borders are.Stops short even while chasing a ball. 
Also.....a note of interest. Neighbors had company visiting for a week last year and they laid the wire loose on the ground without burying it  to give their pup a place to run.Seemed to work fine and they took it when they left.
		 
		
		
		
		
		
		
		
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